the mordant in the gram stain procedure is
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Nursing Elites

NCLEX-RN

NCLEX RN Predictor Exam

1. In the Gram Stain procedure, which component acts as the mordant?

Correct answer: C

Rationale: In the Gram Stain procedure, the mordant is Gram's Iodine. The purpose of the mordant is to form a complex with the crystal violet, enhancing its ability to bind to the cell wall. Crystal violet is actually the primary stain used in the Gram Stain procedure to initially color all cells. Methyl alcohol is the decolorizer that removes the crystal violet from certain cell types. Safranin is the counterstain used to stain those cells that did not retain the crystal violet stain after the decolorization step.

2. An 86-year-old client with decreased visual acuity who uses a cane for mobility requires fall prevention education. What should the nurse teach this client to reduce the risk of falling at home?

Correct answer: D

Rationale: To reduce the risk of falling at home for an elderly client with decreased visual acuity and using a cane for mobility, installing non-slip pads in the shower or bathtub is crucial. This measure helps prevent slips and falls in areas where water accumulation may occur. While taking off shoes and wearing socks may seem comfortable, it increases the risk of slipping. Limiting activities to the lower level of the home may restrict the client's independence and quality of life unnecessarily. Keeping a lamp near the door of every room may improve visibility but does not directly address the risk of falls associated with mobility and visual acuity issues.

3. Your patient ate an 8-ounce cup of Italian ice. How much will you record on the patient's Intake and Output form in terms of this patient's fluid intake?

Correct answer: A

Rationale: The correct answer is 240 cc. Italian ice is considered a fluid, so you would record the intake of 240 cc. Choice B (120 cc) and Choice C (8 cc) are incorrect as they do not reflect the correct amount of fluid intake from an 8-ounce cup of Italian ice. Choice D (0 cc) is incorrect because Italian ice does count as a fluid intake and should be recorded as such.

4. A parent calls the pediatric clinic and is frantic about the bottle of cleaning fluid her child drank for 20 minutes. Which of the following is the most important instruction the nurse can give the parent?

Correct answer: C

Rationale: In situations where a child has ingested a potentially harmful substance, contacting the Poison Control Center quickly is crucial. The Poison Control Center can provide specific guidance tailored to the child's situation, which can include whether immediate medical attention is necessary or if any actions need to be taken at home. Option A, 'This too shall pass,' is not appropriate as it dismisses the seriousness of the situation. Option B, 'Take the child immediately to the ER,' may not always be the best course of action without guidance from experts. Option D, 'Give the child syrup of ipecac,' is outdated advice and not recommended as a first response to poisoning incidents.

5. What is the flap of tissue that covers the trachea upon swallowing called?

Correct answer: C

Rationale: The correct answer is C: Epiglottis. The epiglottis is a flap of tissue that covers the trachea when swallowing to prevent food or liquid from entering the airway. Choice A, Epidermis, is the outer layer of the skin and is not related to the trachea. Choice B, Endocardium, is the inner lining of the heart chambers and is also unrelated to the trachea. Choice D, Epistaxis, refers to a nosebleed and is not the correct term for the tissue covering the trachea.

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